CN215696769U - Reducing rolling mill - Google Patents

Abstract

The utility model discloses a reducing mill, which comprises a direct current motor, a drum-shaped coupler, speed increasing boxes, a protective cover, a conical box body, a roller box body, couplers and a rolling mill, wherein one side of the direct current motor is connected with two speed increasing boxes through the drum-shaped coupler, one sides of the two speed increasing boxes are connected with the conical box body through the couplers, the roller box body is arranged at the top of the conical box body, the protective cover is arranged between the speed increasing boxes and the conical box body, and the conical box body comprises a box body; set up to solitary acceleration rate case through the first order acceleration rate with whole unit, even if be convenient for maintain alone, avoid the relevance to damage, can simplify the design of awl case again to carry out the secondary acceleration rate with the awl case body through big and small bevel gear and give the roll axle of roll case body, through the speed-up step by step, can increase substantially rolling speed, increase of production.

Description

Reducing rolling mill

Technical Field

The utility model belongs to the technical field of steel rolling equipment in the metallurgical industry, and particularly relates to a reducing mill.

Background

The reducing unit consists of two V-shaped cantilever rolling mills, the top cross is 45 degrees, the reducing unit is used for rolling wires with free sizes between phi 5.5 and 13mm, 2 reducing sizing units are additionally arranged behind 8 water cooling sections of a finishing rolling unit in a wire equipment, the finishing rolling unit is actually divided into two sections for Morgan Tekisun 8+2 technology, a water tank arranged between the two sections solves the problem of rolling temperature rise, the temperature of finish rolling is controlled, low-temperature high-control rolling can be realized, and therefore good metallographic structure and mechanical property are obtained, and in order to achieve the rolling effect, 2 reducing sizing units are additionally arranged.

The general rolling size range of the reducing mill set used in the market at present is phi 5.5-13, the rolling speed range is 70-95m/s, the rolling temperature is 850-.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a reducing mill to solve the problems set forth in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a reducing rolling mill comprises a direct current motor, a drum coupler, two speed increasing boxes, a protective cover, a cone box body, a roller box body, couplers and a roller shaft, wherein one side of the direct current motor is connected with the two speed increasing boxes through the drum coupler, one side of the two speed increasing boxes is connected with the cone box body through the couplers, the roller box body is installed at the top of the cone box body, the protective cover is arranged between the speed increasing boxes and the cone box body, the cone box body comprises a box body, two groups of roller structures are arranged in the box body, each roller structure comprises a lower oil film bearing, an upper oil film bearing, an angular contact bearing, a rolling roller shaft, an oil film bearing oil inlet, an upper bearing oil inlet, an input shaft and an output shaft, the right end of the input shaft penetrates through the outer side of the box body to be connected with the output shaft of the speed increasing boxes, the output shaft is installed above the input shaft, the left end of the input shaft is provided with a large bevel gear, and the output shaft is an inclined gear shaft, the bevel gear assembly is characterized in that a small bevel gear meshed with a large bevel gear is mounted at the bottom end of the output shaft, the roll shaft is mounted above the output shaft, two angular contact bearings are mounted at the left end of the input shaft, a cylindrical roller bearing is mounted at the right end of the input shaft, and two angular contact bearings are mounted at the end part of the output shaft.

Preferably, an angular contact bearing is mounted to a tip end of the roll shaft.

Preferably, the safety cover includes support, a supporting beam, supporting cylinder, rotary crank, safety cover body, revolving axle and observation window, a supporting beam is in one side of support, supporting cylinder rotates the top of installing at the support, the safety cover body passes through the revolving axle and rotates the top of installing at a supporting beam, the rotary crank is still installed with last to the safety cover body, the piston rod on supporting cylinder top rotates with the safety cover body to be connected, still be provided with the observation window on the safety cover body.

Compared with the prior art, the utility model has the beneficial effects that: set up to solitary acceleration rate case through the first order acceleration rate with whole unit, even if be convenient for maintain alone, avoid the relevance to damage, can simplify the design of awl case again to carry out the secondary acceleration rate with the awl case body through big and small bevel gear and give the roll axle of roll case body, through the speed-up step by step, can increase substantially rolling speed, increase of production.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of the speed increasing case of the present invention;

FIG. 3 is a top cross-sectional view of the speed increasing case of the present invention;

FIG. 4 is a cross-sectional view of the cone housing of the present invention;

FIG. 5 is a stroke diagram of the shield of the present invention;

in the figure: 1. a direct current motor; 2. a drum coupling; 3. a speed increasing box; 4. a protective cover; 41. a support; 42. A support beam; 43. a support cylinder; 44. a rotary crank; 45. a protective cover body; 46. a rotating shaft; 47. an observation window; 5. a cone box body; 51. a lower oil film bearing; 52. oiling a film bearing; 53. an angular contact bearing; 54. A roll shaft; 55. an oil inlet of the oil film bearing; 56. an upper oil inlet of the bearing; 57. an input shaft; 58. an output shaft; 6. a roller box body; 7. a coupling is provided.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1 to 5, the present invention provides a technical solution: a reducing mill comprises a direct current motor 1, a drum coupler 2, speed increasing boxes 3, a protective cover 4, a cone box body 5, a roller box body 6, couplers 7 and 8, reducing units of two racks adopt independent transmission and are driven by the direct current motor 1 with the rotation speed of 1000 plus 1800kw, the rotation speed of 600 plus 1250r/min can be adjusted, rolling requirements of different rotation speeds are realized, one side of the direct current motor 1 is connected with the two speed increasing boxes 3 through the drum coupler 2, the speed ratios of the two speed increasing boxes 3 are different, the second rack is faster than the first rack, one sides of the two speed increasing boxes 3 are connected with the cone box body 5 through the coupler 7, the roller box body 6 is arranged at the top of the cone box body 5, the protective cover 4 is arranged between the speed increasing boxes 3 and the cone box body 5, the speed increasing boxes 3 adopt one-stage speed increasing, the speed increasing ratio adopts a fixed type and can also carry out customized design to meet the speed and rolling force of different rolling specifications, the design of short transmission chain, reduce the transmission energy consumption, the shaft coupling 2 adopts the connection of double-end crowned teeth, while guaranteeing the transmission of high rotational speed and large torque, the stability of transmission can be guaranteed, the cone box body 5 comprises a box body, two groups of roller structures are arranged in the box body, each roller structure corresponds to one speed increasing box 3, the roller structure comprises a lower oil film bearing 51, an upper oil film bearing 52, an angular contact bearing 53, a rolling roller shaft 54, an oil film bearing oil inlet 55, a bearing upper oil inlet 56, an input shaft 57 and an output shaft 58, the right end of the input shaft 57 penetrates to the outer side of the box body to be connected with the output shaft of the speed increasing box 3, the output shaft 58 is arranged above the input shaft 57, the left end of the input shaft 57 is provided with a large bevel gear, the output shaft 58 is a bevel gear shaft, the bottom end of the output shaft 58 is provided with a small bevel gear meshed with the large bevel gear to carry out the second speed increasing, the rolling roller shaft 54 is arranged above the output shaft 58, two angular contact bearings 53 are installed at the left end of the input shaft 57 and used for bearing axial force, a cylindrical rod bearing is installed at the right end of the input shaft 57, oil film bearings are adopted at the two ends of the input shaft 57 to bear radial force, two angular contact bearings 53 are installed at the end part of the output shaft 58 and used for bearing axial force, a transmission system of the cone box 5 adopts independent transmission, and the two cone/roller boxes are mutually independent.

In this embodiment, preferably, both ends of the roll shaft 54 are supported by oil film bearings, the top end of the roll shaft 54 is provided with an angular contact bearing 53 for offsetting the axial force formed by the helical gear, the roll shaft 54 adopts a cantilever structure, a roll collar is mounted at the cantilever for rolling the high-temperature wire to form a rolling force, the roll housing 6 is provided with a cooling water pipe for cooling the roll collar, and the roll shaft 54 can adjust the rolling range by adjusting the axial distance, so as to finally realize tapping rolling of different specifications.

In this embodiment, preferably, the protection cover 4 includes a support 41, a support beam 42, a support cylinder 43, a rotation crank 44, a protection cover body 45, a rotation shaft 46 and an observation window 47, the support beam 42 is located at one side of the support 41, the support cylinder 43 is rotatably installed at the top of the support 41, the protection cover body 45 is rotatably installed at the top of the support beam 42 through the rotation shaft 46, the rotation crank 44 is further installed on the protection cover body 45, a piston rod at the top end of the support cylinder 43 is rotatably connected with the protection cover body 45, the observation window 47 is further installed on the protection cover body 45 for observing whether the device has a fault during steel rolling, the protection cover 4 is rotated by a cylinder, the rotation speed is uniform and reliable, the protection cover 4 rotates in a 105-degree reverse direction to a bottom support position, the swing arm of the protection cover 4 is reliably supported by the cylinder at the support position and is not easy to tilt, and the support point at 105 degrees is locked by a bolt, prevent the tilting caused by the impact of unexpected external force.

The working principle and the using process of the utility model are as follows: the direct current motor 1 outputs torque, the drum-shaped coupler 2 drives the speed increasing box 3 to increase speed, the speed increasing box 3 drives the cone box body 5 to transmit torque through the coupler 7, and the cone box body 5 performs secondary speed increasing through a big bevel gear and a small bevel gear to a roll shaft 54 of the roll box body 6;

the inner space of the cone box body 5 is limited, and the diameter of a big bevel gear in the cone box body 5 needs to be increased to increase the speed, so that the gear cannot be placed in the box body or the box body is infinitely enlarged, and therefore, the diameter of the big bevel gear or the box body does not need to be increased by independently adding the primary speed increasing box 3 outside;

after the external speed increasing box 3 is added, the rated rotating speed of the input shaft 57 of the cone box body 5 is insufficient, the double-row tapered roller bearing is changed into a double-row deep groove ball bearing, the inner diameter of the bearing is properly adjusted to ensure that the rated rotating speed of the bearing meets the input rotating speed, the theory is that T is 9550P/n, F is T/L, the rotating speed is increased, the torque is reduced, the axial force is also reduced, the shaft diameter size of the original bearing position is changed from phi 140 to phi 130, the double-row tapered roller bearing is changed into a double-row angular contact bearing 53, the rated rotating speed is increased from original 1900r/min to 2800 + 3000r/min, and the speed increasing problem of the input shaft 57 is solved;

because the rotating speed of the output shaft 58 of the cone box body 5 needs to be increased to 8000r/min, the specification rated rotating speed of the existing common bearing can not meet the requirement, and the problem of the rated rotating speed and the problem of the radial force can be solved by adopting an oil film bearing, wherein the radial bearing capacity and the rated rotating speed of the oil film bearing are multiple times of those of the common bearing;

the axial force problem of the bevel gear of the output shaft 58 is solved by changing a four-point angular contact bearing 53 into a double-row angular contact bearing 53, two angular contact bearings 53 on each shaft are assembled in series, and two bearing openings with bevel gears face upwards to resist the axial force formed by the bevel gears; the upper bearing without the bevel gear is assembled with an opening facing downwards to resist the axial force formed by the bevel gear, and because the two angular contact bearings 53 have very high rotating speed and need effective forced lubrication, the two angular contact bearings must be designed into a mode of bidirectional oil injection on the upper end surface and the lower end surface of the bearing, and then the fixing form of the bearing is considered, the two angular contact bearings are designed into a fixing mode of clamping the bearing by the upper bearing cover and the lower bearing cover which can be separated, because of the space, the upper oil injection pad is arranged on the outer circular surface of the upper end cover, the lower oil return is arranged at the bottom of the lower end cover, and the two oil return holes are all formed by interlacing multiple process holes;

the lubrication of bearing adopts thin oil lubrication, oil film bearing separately advances the oil return with roller bearing, guarantee the reliability of oil circuit, the same oil film bearing that 5 is the same is adopted to the roll axle 54 of roller box 6, rated revolution and radial bearing capacity equally satisfy the requirement, through speeding up step by step, 58 rotational speeds of output shaft of cone box 5 have reached 8000r/min, again through the gear acceleration between cone box 5 and the roller box 6, roll axle 54 rotational speed of roller box 6 has reached 9000r/min, the final design rotational speed is: v 3.14 × D n/60 3.14 × 0.23 × 9000/60 ═ 110 m/s.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. The reducing rolling mill is characterized in that: including direct current motor (1), drum coupling (2), acceleration case (3), safety cover (4), awl box (5), roller box (6), shaft coupling (7) and (8), one side of direct current motor (1) is connected with two acceleration cases (3) through drum coupling (2), and two one side of acceleration case (3) is connected with awl box (5) through shaft coupling (7), the top at awl box (5) is installed in roller box (6), safety cover (4) set up between acceleration case (3) and awl box (5), awl box (5) include the box, be provided with two sets of roll structures in the box, roll structure includes oil film bearing (51), last oil film bearing (52), angular contact bearing (53), roll axle (54), oil film bearing oil inlet (55), last oil inlet (56) of bearing, The gearbox comprises an input shaft (57) and an output shaft (58), wherein the right end of the input shaft (57) penetrates through the outer side of the gearbox body and is connected with the output shaft of the speed increasing box (3), the output shaft (58) is arranged above the input shaft (57), a large bevel gear is arranged at the left end of the input shaft (57), the output shaft (58) is a bevel gear shaft, a small bevel gear meshed with the large bevel gear is arranged at the bottom end of the output shaft (58), a rolling shaft (54) is arranged above the output shaft (58), two angular contact bearings (53) are arranged at the left end of the input shaft (57), a cylindrical roller bearing is arranged at the right end of the input shaft (57), and two angular contact bearings (53) are arranged at the end part of the output shaft (58).

2. A reducing mill according to claim 1, characterized in that: an angular contact bearing (53) is mounted on the top end of the roll shaft (54).

3. A reducing mill according to claim 1, characterized in that: protective cover (4) are including support (41), supporting beam (42), support cylinder (43), rotary crank (44), protective cover body (45), revolving axle (46) and observation window (47), supporting beam (42) are in one side of support (41), support cylinder (43) rotate and install the top at support (41), protective cover body (45) rotate through revolving axle (46) and install the top at supporting beam (42), rotary crank (44) are still installed on protective cover body (45) and on, the piston rod on support cylinder (43) top rotates with protective cover body (45) and is connected, still be provided with observation window (47) on protective cover body (45).

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